I have tingling in the back of my head. Tingling feels more like a mild electrical shock that comes in pulses. It started directly behind my left ear and has travelled to back, Ctr of head. When pain comes it enough to make me whine and grab my attention. Earlier this week I also had a dumbness in my left arm, milder shocking feelings. Elbow feels like arthritis pain, have been using OCmed, i.e. Icy Hot, topical. Any ideas on remedy for head spasms /